| Date | Panel | Item | Activity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Intellectual disability - microarray and sequencing v5.117 | RNF13 | Arina Puzriakova Phenotypes for gene: RNF13 were changed from Cortical visual impairment; Epileptic encephalopathy, early infantile, 73, 618379; Failure to thrive; Seizures; Congenital microcephaly; Abnormal muscle tone; Feeding difficulties; Intellectual disability; Global developmental delay; Sensorineural hearing impairment to Developmental and epileptic encephalopathy 73, OMIM:618379 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.1511 | RNF113A | Arina Puzriakova Tag for-review was removed from gene: RNF113A. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.1510 | RNF13 |
Arina Puzriakova Tag watchlist was removed from gene: RNF13. Tag for-review was removed from gene: RNF13. |
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| Intellectual disability - microarray and sequencing v3.1510 | RNF113A | Sarah Leigh commented on gene: RNF113A: The rating of this gene has been updated following NHS Genomic Medicine Service approval. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.1510 | RNF13 | Sarah Leigh commented on gene: RNF13: The rating of this gene has been updated following NHS Genomic Medicine Service approval. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.1509 | RNF113A |
Arina Puzriakova Source Expert Review Green was added to RNF113A. Rating Changed from Amber List (moderate evidence) to Green List (high evidence) |
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| Intellectual disability - microarray and sequencing v3.1509 | RNF13 |
Arina Puzriakova Source Expert Review Green was added to RNF13. Rating Changed from Amber List (moderate evidence) to Green List (high evidence) |
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| Intellectual disability - microarray and sequencing v3.1319 | RNF113A | Arina Puzriakova Phenotypes for gene: RNF113A were changed from X-linked trichothiodystrophy; Trichothiodystrophy 5, nonphotosensitive, 300953; Intellectual disability to Trichothiodystrophy 5, nonphotosensitive, OMIM:300953 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.485 | ZNF148 | Arina Puzriakova reviewed gene: ZNF148: Rating: AMBER; Mode of pathogenicity: None; Publications: 27964749; Phenotypes: Global developmental delay, absent or hypoplastic corpus callosum, and dysmorphic facies, 617260; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.479 | RNF113A | Arina Puzriakova Classified gene: RNF113A as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.479 | RNF113A | Arina Puzriakova Gene: rnf113a has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.478 | RNF113A | Arina Puzriakova Tag for-review tag was added to gene: RNF113A. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.478 | RNF13 | Arina Puzriakova Classified gene: RNF13 as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.478 | RNF13 | Arina Puzriakova Gene: rnf13 has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.477 | RNF13 | Arina Puzriakova Tag for-review tag was added to gene: RNF13. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.315 | ZMYM2 |
Konstantinos Varvagiannis gene: ZMYM2 was added gene: ZMYM2 was added to Intellectual disability. Sources: Literature Mode of inheritance for gene: ZMYM2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: ZMYM2 were set to 32891193 Phenotypes for gene: ZMYM2 were set to Abnormality of the urinary system; Global developmental delay; Intellectual disability; Microcephaly; Abnormality of the cardiovascular system; Autism; Seizures; Abnormality of the head or neck; Abnormality of the nail; Small hand; Short foot; Clinodactyly Penetrance for gene: ZMYM2 were set to unknown Review for gene: ZMYM2 was set to AMBER Added comment: Heterozygous pathogenic (pLoF) ZMYM2 variants have been reported in individuals with syndromic presentation including CAKUT (in several cases) and variable neurological manifestations among extra-renal features. DD and ID were reported in some of the families described to date as summarized below. You might consider inclusion with green/amber rating in the ID panel and green in the panel for CAKUT. -- Connaughton et al (2020 - PMID: 32891193) report on 19 individuals (from 15 unrelated families) with heterozygous pathogenic ZMYM2 variants. [Article not reviewed in detail]. Affected individuals from 7 families presented with CAKUT while all of them displayed extra-renal features. Neurological manifestations were reported in 16 individuals from 14 families (data not available for 1 fam), among others hypotonia (3/14 fam), speech delay (4/14 fam), global DD (9/14 fam), ID (4/14 fam), microcephaly (4/14 fam). ASD was reported in 4 fam (4 indiv). Seizures were reported in 2 fam (2 indiv). Variable other features included cardiac defects, facial dysmorphisms, small hands and feet with dys-/hypo-plastic nails and clinodactyly. 14 pLoF variants were identified, in most cases as de novo events (8 fam). In 2 families the variant was inherited from an affected parent. Germline mosaicism occurred in 1 family. The human disease features were recapitulated in a X. tropicalis morpholino knockdown, with expression of truncating variants failing to rescue renal and craniofacial defects. Heterozygous Zmym2-deficient mice also recapitulated the features of CAKUT. ZMYM2 (previously ZNF198) encodes a nuclear zinc finger protein localizing to the nucleus (and PML nuclear body). It has previously been identified as transcriptional corepressor interacting with nuclear receptors and the LSD1-CoREST-HDAC1 complex. It has also been shown to interact with FOXP transcription factors. The authors provide evidence for loss of interaction of the truncated ZMYM2 with FOXP1 (mutations in the latter having recently been reported in syndromic CAKUT). Sources: Literature |
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| Intellectual disability - microarray and sequencing v3.78 | RNF113A | Sarah Leigh Tag Skewed X-inactivation tag was added to gene: RNF113A. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.24 | RNF13 | Sarah Leigh Classified gene: RNF13 as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.24 | RNF13 | Sarah Leigh Gene: rnf13 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.15 | RNF13 | Sarah Leigh reviewed gene: RNF13: Rating: GREEN; Mode of pathogenicity: Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments; Publications: ; Phenotypes: ; Mode of inheritance: None | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.15 | RNF113A | Sarah Leigh Classified gene: RNF113A as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.15 | RNF113A | Sarah Leigh Gene: rnf113a has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.14 | RNF113A | Sarah Leigh Publications for gene: RNF113A were set to 25612912; 29144457 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.3 | RNF13 | Zornitza Stark reviewed gene: RNF13: Rating: GREEN; Mode of pathogenicity: None; Publications: 30595371; Phenotypes: Epileptic encephalopathy, early infantile, 73, MIM# 618379; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.3 | ZNF148 | Zornitza Stark reviewed gene: ZNF148: Rating: GREEN; Mode of pathogenicity: None; Publications: 27964749; Phenotypes: Global developmental delay, absent or hypoplastic corpus callosum, and dysmorphic facies, 617260; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.0 | RNF113A | Konstantinos Varvagiannis reviewed gene: RNF113A: Rating: GREEN; Mode of pathogenicity: None; Publications: 25612912, 31880405, 31793730, 29133357, 30506991, 15256591, 24026126, 23555887; Phenotypes: ; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.0 | SUZ12 |
Konstantinos Varvagiannis changed review comment from: ID can be a feature in individuals heterozygous for SUZ12 pathogenic variants. 13 affected individuals (from 12 families) have been reported: [1] PMID 28229514 (Imagawa et al, 2017) : 1 individual [2] PMID 30019515 (Imagawa et al, 2018) : 2 further unrelated subjects [3] PMID 31736240 (Cyrus et al, 2019) : 10 additional subjects (from 9 families) Reviewed by Cyrus et al, features observed in more than half of the (13) affected individuals included prenatal and/or postnatal overgrowth (in some only prenatal, others only postnatal, others did not manifest overgrowth at all), some suggestive facial features (eg. prominent forehead, hypertelorism, downslanting palpebral fissures, round face, broad/low nasal bridge), DD and ID (the latter in 7/13, in most cases mild), advanced bone age, musculoskeletal abnormalities and cryptorchidism. Less frequent features included brain MRI abnormalities (eg. CC hypoplasia/agenesis, etc.), umbilical hernias, respiratory abnormalities, cardiac anomalies (in one). All were diagnosed with WES/WGS/panel testing, with few having additional findings upon this or prior testing (eg. CNVs/SNVs). SUZ12 encodes one of the 4 core proteins of the PRC2 complex (the 3 other being encoded by EZH1/2, EED and RBBP4/7). The complex has a methyltransferase activity, catalyzing addition of up to 3 methyl groups on histone 3 at lysine residue 27 (H3K27), leading to chromatin compaction and further to gene silencing. Mutations in genes encoding 2 other core components of the PRC2 complex - namely EZH2 and EED - cause Weaver and Cohen-Gibson syndrome with overlapping phenotype incl. overgrowth, advanced bone age, craniofacial features and DD/ID. The SET domain of EZH1/2 and EED as well as the VEFS domain of SUZ12 are contributing to the catalytic activity. SUZ12 variants reported to date include missense and pLoF variants (frameshift, nonsense, splice site ones) predicted to disrupt or eliminate the VEFS-box domain [almost all missense within this domain with the exception of one proximal to it (Arg535Gln) / pLoF causing truncation prior or within this domain (Arg654Ter might be an exception)] {NP_056170.2}. Variants either occurred de novo or were inherited (~1/3), on some occasions from a mildly affected parent. Parental mosaicism has also been reported (eg. in ref1, and one or possibly two additional families in ref3). Some preliminary assumptions on possible genotype-phenotype correlations (for overgrowth and ID related to missense/pLoF variants) are discussed in ref3. SUZ12 is also be deleted in some patients with NF1 deletion (and a diagnosis of neurofibromatosis type 1). Deletion of SUZ12 has been proposed to contribute to the phenotype of these individuals (eg. overgrowth, cognitive development, facial features). [Discussed in ref1]. Functional studies have been carried out only in the first report (ref1) and demonstrated decreased trimethylation of H3K27 in the case of a missense variant. Overall a partial loss-of-function mechanism has been proposed for the variants. Mouse models: A study by Pasini et al (PMID: 15385962) did not report phenotypic differences between wt and heterozygous Suz12 knockout mice (gene-trap vector) as for size, morphology and fertility. Total knockout resulted in embryonic lethality, significant growth retardation and several developmental defects. Loss of Suz12 was shown to result in absence of di- and tri-methylated H3K27 in the ko embryos. In another study cited (Miro et al - PMID: 19535498) heterozygous mice (replacement of exons 12-16 with a lacZ gene and neo cassette) displayed variable CNS defects with incomplete penetrance. The role of the PRC2 complex and the phenotypes related to mutations in genes encoding its core components, are discussed in PMID: 31724824 (also by Cyrus et al, 2019). SUZ12 is not associated with any phenotype in OMIM. In G2P it is included in the DD panel associated with Weaver-like overgrowth syndrome (disease confidence : confirmed). The gene is also included in gene panels for ID offered by some diagnostic laboratories (eg. GeneDx). Sources: Literature; to: ID can be a feature in individuals heterozygous for SUZ12 pathogenic variants. 13 affected individuals (from 12 families) have been reported: [1] PMID 28229514 (Imagawa et al, 2017) : 1 individual [2] PMID 30019515 (Imagawa et al, 2018) : 2 further unrelated subjects [3] PMID 31736240 (Cyrus et al, 2019) : 10 additional subjects (from 9 families) Reviewed by Cyrus et al, features observed in more than half of the (13) affected individuals included prenatal and/or postnatal overgrowth (in some only prenatal, others only postnatal, others did not manifest overgrowth at all), some suggestive facial features (eg. prominent forehead, hypertelorism, downslanting palpebral fissures, round face, broad/low nasal bridge), DD and ID (the latter in 7/13, in most cases mild), advanced bone age, musculoskeletal abnormalities and cryptorchidism. Less frequent features included brain MRI abnormalities (eg. CC hypoplasia/agenesis, etc.), umbilical hernias, respiratory abnormalities, cardiac anomalies (in one). All were diagnosed with WES/WGS/panel testing, with few having additional findings upon this or prior testing (eg. CNVs/SNVs). SUZ12 encodes one of the 4 core proteins of the PRC2 complex (the 3 other being encoded by EZH1/2, EED and RBBP4/7). The complex has a methyltransferase activity, catalyzing addition of up to 3 methyl groups on histone 3 at lysine residue 27 (H3K27), leading to chromatin compaction and further to gene silencing. Mutations in genes encoding 2 other core components of the PRC2 complex - namely EZH2 and EED - cause Weaver and Cohen-Gibson syndrome with overlapping phenotype incl. overgrowth, advanced bone age, craniofacial features and DD/ID. The SET domain of EZH1/2 and EED as well as the VEFS domain of SUZ12 are contributing to the catalytic activity. SUZ12 variants reported to date include missense and pLoF variants (frameshift, nonsense, splice site ones) predicted to disrupt or eliminate the VEFS-box domain [almost all missense within this domain with the exception of one proximal to it (Arg535Gln) / pLoF causing truncation prior or within this domain (Arg654Ter might be an exception)] {NP_056170.2}. Variants either occurred de novo or were inherited (~1/3), on some occasions from a mildly affected parent. Parental mosaicism has also been reported (eg. in ref1, and one or possibly two additional families in ref3). Some preliminary assumptions on possible genotype-phenotype correlations (for overgrowth and ID related to missense/pLoF variants) are discussed in ref3. SUZ12 may also be deleted in some patients with NF1 deletion (and a diagnosis of neurofibromatosis type 1). Deletion of SUZ12 has been proposed to contribute to the phenotype of these individuals (eg. overgrowth, cognitive development, facial features). [Discussed in ref1]. Functional studies have been carried out only in the first report (ref1) and demonstrated decreased trimethylation of H3K27 in the case of a missense variant. Overall a partial loss-of-function mechanism has been proposed for the variants. Mouse models: A study by Pasini et al (PMID: 15385962) did not report phenotypic differences between wt and heterozygous Suz12 knockout mice (gene-trap vector) as for size, morphology and fertility. Total knockout resulted in embryonic lethality, significant growth retardation and several developmental defects. Loss of Suz12 was shown to result in absence of di- and tri-methylated H3K27 in the ko embryos. In another study cited (Miro et al - PMID: 19535498) heterozygous mice (replacement of exons 12-16 with a lacZ gene and neo cassette) displayed variable CNS defects with incomplete penetrance. The role of the PRC2 complex and the phenotypes related to mutations in genes encoding its core components, are discussed in PMID: 31724824 (also by Cyrus et al, 2019). SUZ12 is not associated with any phenotype in OMIM. In G2P it is included in the DD panel associated with Weaver-like overgrowth syndrome (disease confidence : confirmed). The gene is also included in gene panels for ID offered by some diagnostic laboratories (eg. GeneDx). Sources: Literature |
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| Intellectual disability - microarray and sequencing v3.0 | SUZ12 |
Konstantinos Varvagiannis changed review comment from: ID can be a feature in individuals heterozygous for SUZ12 pathogenic variants. 13 affected individuals (from 12 families) have been reported: [1] PMID 28229514 (Imagawa et al, 2017) : 1 individual [2] PMID 30019515 (Imagawa et al, 2018) : 2 further unrelated subjects [3] PMID 31736240 (Cyrus et al, 2019) : 10 newly diagnosed subjects (from 9 families) Reviewed by Cyrus et al, features observed in more than half of the (13) affected individuals included prenatal and/or postnatal overgrowth (in some only prenatal, others only postnatal, others did not manifest overgrowth at all), some suggestive facial features (eg. prominent forehead, hypertelorism, downslanting palpebral fissures, round face, broad/low nasal bridge), DD and ID (the latter in 7/13, in most cases mild), advanced bone age, musculoskeletal abnormalities and cryptorchidism. Less frequent features included brain MRI abnormalities (eg. CC hypoplasia/agenesis, etc.), umbilical hernias, respiratory abnormalities, cardiac anomalies (in one). All were diagnosed with WES/WGS/panel testing, with few having additional findings upon this or prior testing (eg. CNVs/SNVs). SUZ12 encodes one of the 4 core proteins of the PRC2 complex (the 3 other being encoded by EZH1/2, EED and RBBP4/7). The complex has a methyltransferase activity, catalyzing addition of up to 3 methyl groups on histone 3 at lysine residue 27 (H3K27), leading to chromatin compaction and further to gene silencing. Mutations in genes encoding 2 other core components of the PRC2 complex - namely EZH2 and EED - cause Weaver and Cohen-Gibson syndrome with overlapping phenotype incl. overgrowth, advanced bone age, craniofacial features and DD/ID. The SET domain of EZH1/2 and EED as well as the VEFS domain of SUZ12 are contributing to the catalytic activity. SUZ12 variants reported to date include missense and pLoF variants (frameshift, nonsense, splice site ones) predicted to disrupt or eliminate the VEFS-box domain [almost all missense within this domain with the exception of one proximal to it (Arg535Gln) / pLoF causing truncation prior or within this domain (Arg654Ter might be an exception)] {NP_056170.2}. Variants either occurred de novo or were inherited (~1/3), on some occasions from a mildly affected parent. Parental mosaicism has also been reported (eg. in ref1, and one or possibly two additional families in ref3). Some preliminary assumptions on possible genotype-phenotype correlations (for overgrowth and ID related to missense/pLoF variants) are discussed in ref3. SUZ12 is also be deleted in some patients with NF1 deletion (and a diagnosis of neurofibromatosis type 1). Deletion of SUZ12 has been proposed to contribute to the phenotype of these individuals (eg. overgrowth, cognitive development, facial features). [Discussed in ref1]. Functional studies have been carried out only in the first report (ref1) and demonstrated decreased trimethylation of H3K27 in the case of a missense variant. Overall a partial loss-of-function mechanism has been proposed for the variants. Mouse models: An study by Pasini et al (PMID: 15385962) did not report phenotypic differences between wt and heterozygous Suz12 knockout mice (gene-trap vector) as for size, morphology and fertility. Total knockout resulted in embryonic lethality, significant growth retardation and several developmental defects. Loss of Suz12 was shown to result in absence of di- and tri-methylated H3K27 in the ko embryos. In another study cited (Miro et al - PMID: 19535498) heterozygous mice (replacement of exons 12-16 with a lacZ gene and neo cassette) displayed variable CNS defects with incomplete penetrance. The role of the PRC2 complex and the phenotypes related to mutations in genes encoding its core components, are discussed in PMID: 31724824 (also by Cyrus et al, 2019). SUZ12 is not associated with any phenotype in OMIM. In G2P it is included in the DD panel associated with Weaver-like overgrowth syndrome (disease confidence : confirmed). The gene is also included in gene panels for ID offered by some diagnostic laboratories (eg. GeneDx). Sources: Literature; to: ID can be a feature in individuals heterozygous for SUZ12 pathogenic variants. 13 affected individuals (from 12 families) have been reported: [1] PMID 28229514 (Imagawa et al, 2017) : 1 individual [2] PMID 30019515 (Imagawa et al, 2018) : 2 further unrelated subjects [3] PMID 31736240 (Cyrus et al, 2019) : 10 additional subjects (from 9 families) Reviewed by Cyrus et al, features observed in more than half of the (13) affected individuals included prenatal and/or postnatal overgrowth (in some only prenatal, others only postnatal, others did not manifest overgrowth at all), some suggestive facial features (eg. prominent forehead, hypertelorism, downslanting palpebral fissures, round face, broad/low nasal bridge), DD and ID (the latter in 7/13, in most cases mild), advanced bone age, musculoskeletal abnormalities and cryptorchidism. Less frequent features included brain MRI abnormalities (eg. CC hypoplasia/agenesis, etc.), umbilical hernias, respiratory abnormalities, cardiac anomalies (in one). All were diagnosed with WES/WGS/panel testing, with few having additional findings upon this or prior testing (eg. CNVs/SNVs). SUZ12 encodes one of the 4 core proteins of the PRC2 complex (the 3 other being encoded by EZH1/2, EED and RBBP4/7). The complex has a methyltransferase activity, catalyzing addition of up to 3 methyl groups on histone 3 at lysine residue 27 (H3K27), leading to chromatin compaction and further to gene silencing. Mutations in genes encoding 2 other core components of the PRC2 complex - namely EZH2 and EED - cause Weaver and Cohen-Gibson syndrome with overlapping phenotype incl. overgrowth, advanced bone age, craniofacial features and DD/ID. The SET domain of EZH1/2 and EED as well as the VEFS domain of SUZ12 are contributing to the catalytic activity. SUZ12 variants reported to date include missense and pLoF variants (frameshift, nonsense, splice site ones) predicted to disrupt or eliminate the VEFS-box domain [almost all missense within this domain with the exception of one proximal to it (Arg535Gln) / pLoF causing truncation prior or within this domain (Arg654Ter might be an exception)] {NP_056170.2}. Variants either occurred de novo or were inherited (~1/3), on some occasions from a mildly affected parent. Parental mosaicism has also been reported (eg. in ref1, and one or possibly two additional families in ref3). Some preliminary assumptions on possible genotype-phenotype correlations (for overgrowth and ID related to missense/pLoF variants) are discussed in ref3. SUZ12 is also be deleted in some patients with NF1 deletion (and a diagnosis of neurofibromatosis type 1). Deletion of SUZ12 has been proposed to contribute to the phenotype of these individuals (eg. overgrowth, cognitive development, facial features). [Discussed in ref1]. Functional studies have been carried out only in the first report (ref1) and demonstrated decreased trimethylation of H3K27 in the case of a missense variant. Overall a partial loss-of-function mechanism has been proposed for the variants. Mouse models: A study by Pasini et al (PMID: 15385962) did not report phenotypic differences between wt and heterozygous Suz12 knockout mice (gene-trap vector) as for size, morphology and fertility. Total knockout resulted in embryonic lethality, significant growth retardation and several developmental defects. Loss of Suz12 was shown to result in absence of di- and tri-methylated H3K27 in the ko embryos. In another study cited (Miro et al - PMID: 19535498) heterozygous mice (replacement of exons 12-16 with a lacZ gene and neo cassette) displayed variable CNS defects with incomplete penetrance. The role of the PRC2 complex and the phenotypes related to mutations in genes encoding its core components, are discussed in PMID: 31724824 (also by Cyrus et al, 2019). SUZ12 is not associated with any phenotype in OMIM. In G2P it is included in the DD panel associated with Weaver-like overgrowth syndrome (disease confidence : confirmed). The gene is also included in gene panels for ID offered by some diagnostic laboratories (eg. GeneDx). Sources: Literature |
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| Intellectual disability - microarray and sequencing v3.0 | SUZ12 |
Konstantinos Varvagiannis gene: SUZ12 was added gene: SUZ12 was added to Intellectual disability. Sources: Literature Mode of inheritance for gene: SUZ12 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: SUZ12 were set to 28229514; 30019515; 31736240; 15385962; 19535498; 31724824 Phenotypes for gene: SUZ12 were set to Overgrowth; Global developmental delay; Intellectual disability; Accelerated skeletal maturation; Abnormality of the skeletal system; Abnormality of the genitourinary system; Abnormality of the corpus callosum; Abnormality of the respiratory system; Abnormality of the abdominal wall Penetrance for gene: SUZ12 were set to unknown Review for gene: SUZ12 was set to GREEN Added comment: ID can be a feature in individuals heterozygous for SUZ12 pathogenic variants. 13 affected individuals (from 12 families) have been reported: [1] PMID 28229514 (Imagawa et al, 2017) : 1 individual [2] PMID 30019515 (Imagawa et al, 2018) : 2 further unrelated subjects [3] PMID 31736240 (Cyrus et al, 2019) : 10 newly diagnosed subjects (from 9 families) Reviewed by Cyrus et al, features observed in more than half of the (13) affected individuals included prenatal and/or postnatal overgrowth (in some only prenatal, others only postnatal, others did not manifest overgrowth at all), some suggestive facial features (eg. prominent forehead, hypertelorism, downslanting palpebral fissures, round face, broad/low nasal bridge), DD and ID (the latter in 7/13, in most cases mild), advanced bone age, musculoskeletal abnormalities and cryptorchidism. Less frequent features included brain MRI abnormalities (eg. CC hypoplasia/agenesis, etc.), umbilical hernias, respiratory abnormalities, cardiac anomalies (in one). All were diagnosed with WES/WGS/panel testing, with few having additional findings upon this or prior testing (eg. CNVs/SNVs). SUZ12 encodes one of the 4 core proteins of the PRC2 complex (the 3 other being encoded by EZH1/2, EED and RBBP4/7). The complex has a methyltransferase activity, catalyzing addition of up to 3 methyl groups on histone 3 at lysine residue 27 (H3K27), leading to chromatin compaction and further to gene silencing. Mutations in genes encoding 2 other core components of the PRC2 complex - namely EZH2 and EED - cause Weaver and Cohen-Gibson syndrome with overlapping phenotype incl. overgrowth, advanced bone age, craniofacial features and DD/ID. The SET domain of EZH1/2 and EED as well as the VEFS domain of SUZ12 are contributing to the catalytic activity. SUZ12 variants reported to date include missense and pLoF variants (frameshift, nonsense, splice site ones) predicted to disrupt or eliminate the VEFS-box domain [almost all missense within this domain with the exception of one proximal to it (Arg535Gln) / pLoF causing truncation prior or within this domain (Arg654Ter might be an exception)] {NP_056170.2}. Variants either occurred de novo or were inherited (~1/3), on some occasions from a mildly affected parent. Parental mosaicism has also been reported (eg. in ref1, and one or possibly two additional families in ref3). Some preliminary assumptions on possible genotype-phenotype correlations (for overgrowth and ID related to missense/pLoF variants) are discussed in ref3. SUZ12 is also be deleted in some patients with NF1 deletion (and a diagnosis of neurofibromatosis type 1). Deletion of SUZ12 has been proposed to contribute to the phenotype of these individuals (eg. overgrowth, cognitive development, facial features). [Discussed in ref1]. Functional studies have been carried out only in the first report (ref1) and demonstrated decreased trimethylation of H3K27 in the case of a missense variant. Overall a partial loss-of-function mechanism has been proposed for the variants. Mouse models: An study by Pasini et al (PMID: 15385962) did not report phenotypic differences between wt and heterozygous Suz12 knockout mice (gene-trap vector) as for size, morphology and fertility. Total knockout resulted in embryonic lethality, significant growth retardation and several developmental defects. Loss of Suz12 was shown to result in absence of di- and tri-methylated H3K27 in the ko embryos. In another study cited (Miro et al - PMID: 19535498) heterozygous mice (replacement of exons 12-16 with a lacZ gene and neo cassette) displayed variable CNS defects with incomplete penetrance. The role of the PRC2 complex and the phenotypes related to mutations in genes encoding its core components, are discussed in PMID: 31724824 (also by Cyrus et al, 2019). SUZ12 is not associated with any phenotype in OMIM. In G2P it is included in the DD panel associated with Weaver-like overgrowth syndrome (disease confidence : confirmed). The gene is also included in gene panels for ID offered by some diagnostic laboratories (eg. GeneDx). Sources: Literature |
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| Intellectual disability - microarray and sequencing v2.1062 | TDP2 |
Konstantinos Varvagiannis gene: TDP2 was added gene: TDP2 was added to Intellectual disability. Sources: Literature,Radboud University Medical Center, Nijmegen Mode of inheritance for gene: TDP2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: TDP2 were set to 24658003; 30109272; 31410782 Phenotypes for gene: TDP2 were set to Spinocerebellar ataxia, autosomal recessive 23, 616949) Penetrance for gene: TDP2 were set to unknown Review for gene: TDP2 was set to GREEN gene: TDP2 was marked as current diagnostic Added comment: Biallelic pathogenic TGP2 variants cause Spinocerebellar ataxia, autosomal recessive 23 (MIM 616949). At least 6 affected individuals from 4 families have been reported, in all cases homozygous for LoF variants (3 different). ID, epilepsy and ataxia are consistent features of the disorder. TDP2 encodes a phosphodiesterase that is required for efficient repair of double strand breaks (DSBs) produced by abortive topoisomerase II (TOP2) activity. The gene is expressed in fetal and adult human brain. Evidence at the variant level (mRNA, protein levels) and additional studies for impairment of TOP2-induced DSB repair support a role. Animal models (primarily mice) reproduce the DSB repair defect, provide some histopathological evidence, show transcriptional dysregulation of genes (in line with the role of TOP2 in transcription). They have however failed to reproduce relevant neurological phenotypes. Published studies are summarized below. TDP2 is included in gene panels for ID offered by some diagnostic laboratories (incl. Radboudumc and GeneDx). There is no associated phenotype in G2P. TDP2 is listed among the current primary ID genes in SysID. Overall, this gene could be considered for inclusion in the ID and epilepsy panels probably as green (>=3 patients/families/variants, relevant ID and seizures in all, expression in brain, mRNA/protein levels tested, impaired activity) or amber (absence of neurological phenotypes in mouse model). ------------ [1] - PMID: 24658003 (Gómez-Herreros et al. 2014): Reports 3 individuals from a consanguineous Irish family. Features included seizures (onset by 2m, 6m and 12y), ID (3/3) and ataxia (3/3). A splicing variant (NM_016614.3:c.425+1G>A) was found in a 9.08-Mb region of homozygosity shared by all. A further ZNF193 missense variant localizing in the same region was thought unlikely to contribute to the phenotype (evidence also provided in subsequent study). The effect of the specific variant was proven by abnormal mRNA size, lower mRNA levels due to NMD (corrected upon cyclohexamide treatment), loss of TDP2 protein upon WB, loss of protein activity in lymphoblastoid cells from affected individuals, decreased repair of DSBs and increased cell death upon addition of etoposide (which promotes TOP2 abortive activity). The authors report very briefly on a further patient (from Egypt), with ID, 'reports of fits' and ataxia. This individual, with also affected sibs, was homozygous LoF (c.413_414delinsAA / p.Ser138*). Again, the authors were not able to detect TDP2 activity in blood from this subject. As also commented: - TDP2 has relevant expression in human (particularly adult) brain. - Mouse model : Tdp2 is expressed in relevant tissues, absence of Tdp2 activity was observed in neural tissue of mice homoyzgous for an ex1-3 del, with impairment of DSB repair. The authors were unable to detect a neurological phenotype with behavioral analyses, preliminary assesment of seizure propensity. Mice did not show developmental defects. Histopathology however, revealed ~25% reduction in the density of interneurons in cerebellum (a 'hallmark of DSB repair' and associated with seizures and ataxia). Transcription of several genes was shown to be disregulated. - Knockdown in zebrafish appears to affect left-right axis detremination (cited PMID: 18039968). [2] - PMID: 30109272 (Zagnoli-Vieira et al. 2018): A 6 y.o. male with seizures (onset by 5m), hypotonia, DD and ID, microcephaly and some additional clinical features and testing (ETC studies on muscle biopsy, +lactate, +(lactate/pyruvate) ratio) which could be suggestive of mitochondrial disorder. This individual from the US was homozygous for the c.425+1G>A variant but lacked the ZNF193 one (despite a shared haplotype with the Irish patients). Again absence of the protein was shown upon WB in patient fibroblasts, also supported by its activity. Complementation studies restored the DSB repair defect. The defect was specific to TOP2-induced DSBs as suggested by hypersensitivity to etoposide but not to ionizing radiation. CRISPR/Cas9 generated mutant human A549 cells demonstrated abnormal DSB repair. Fibroblasts / edited A549 cells failed to show mitochondrial defects (which were noted in muscle). [3] - PMID: 31410782 (Ciaccio et al. 2019): A girl born to consanguineous Italian parents, presented with moderate/severe ID, seizures (onset at 12y) and - among others - gait ataxia, tremor and dysmetria. MRI at the age of 12, demonstrated cerebellar atrophy (although previous exams were N). WES revealed a homozygous nonsense variant (c.400C>T / p.Arg134Ter) for which each parent was found to be carrier. Previous investigations included aCGH, NGS testing for epilepsy and metabolic testing. Sources: Literature, Radboud University Medical Center, Nijmegen |
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| Intellectual disability - microarray and sequencing v2.981 | RNF13 | Catherine Snow Tag watchlist tag was added to gene: RNF13. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.978 | RNF13 |
Catherine Snow Source Expert Review was added to RNF13. Source Expert Review Amber was added to RNF13. Added phenotypes Epileptic encephalopathy, early infantile, 73, 618379 for gene: RNF13 Publications for gene RNF13 were changed from to 30595371 Rating Changed from No List (delete) to Amber List (moderate evidence) |
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| Intellectual disability - microarray and sequencing v2.978 | ZNF142 |
Catherine Snow Source Expert Review Green was added to ZNF142. Source Expert Review was added to ZNF142. Added phenotypes Neurodevelopmental disorder with impaired speech and hyperkinetic movements, 618425 for gene: ZNF142 Rating Changed from No List (delete) to Green List (high evidence) |
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| Intellectual disability - microarray and sequencing v2.800 | ZNF142 |
Konstantinos Varvagiannis gene: ZNF142 was added gene: ZNF142 was added to Intellectual disability. Sources: Literature Mode of inheritance for gene: ZNF142 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZNF142 were set to 31036918 Phenotypes for gene: ZNF142 were set to Global developmental delay; Intellectual disability; Seizures; Tremor; Dystonia Penetrance for gene: ZNF142 were set to unknown Review for gene: ZNF142 was set to GREEN Added comment: Khan et al. (2019 - PMID: 31036918) describe the phenotype of 7 females from 4 families, harboring biallelic likely pathogenic ZNF142 variants. Overlapping features included cognitive impairment (ID in 6/7 from 3 families, borderline intellectual functioning was reported one occasion), speech impairement and motor impairment (7/7), and variably penetrant seizures (5/7), tremor (4/7) and dystonia (3/7). Most individuals (5/7) had experienced at least one episode of seizures (tonic-clonic) though seizures were recurrent in 3 sibs. Other disorders with ID (eg. Angelman syndrome, Rett syndrome, chromosomal disorders) or movement disorders as a feature were previously ruled out for many subjects. 6 individuals were homozygous or compound heterozygous for LoF (stopgain or frameshift) variants. One individual harbored 2 missense SNVs in the compound heterozygous state. Variants reported include (NM_001105537.2): c. 817_818delAA (p.Lys273Glufs*32), c.1292delG (p.Cys431Leufs*11), c.3175C>T (p.Arg1059*), c.4183delC (p.Leu1395*), c.3698G>T (p.Cys1233Phe), c.4498C>T (p.Arg1500Trp) with the LoF variants predicted to result in NMD. Expression or functional studies were not carried out. ZNF142 encodes a C2H2 domain-containing transcription factor. Mutations in other zinc finger proteins (ZNF/zfp) have been reported in several neurodevelopmental disorders impacting the CNS (eg. ZBTB20 and ZBTB11 heterozygous and biallelic mutations, respectively) and/or presenting with movement disorders among their manifestations (eg. YY1). As the authors comment, homozygous ablation of the orthologous (Zfp142) locus in mice results in behavioral and neurological phenotypes [MGI ref.ID: J:211773 cited - http://www.informatics.jax.org/marker/reference/J:211773 (though Zfp142 or its locus do not seem to appear in the list)]. ZNF142 is not - at least commonly - included in gene panels for ID offered by diagnostic laboratories. It is not associated with any phenotype in OMIM, nor in G2P. As a result, this gene can be considered for inclusion in the current panel as probably as green (individuals from 3 families, appropriate degree of ID for the current panel) or amber (if further evidence would be required). Sources: Literature |
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| Intellectual disability - microarray and sequencing v2.789 | RNF135 | Louise Daugherty Publications for gene: RNF135 were set to | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.788 | RNF135 | Louise Daugherty Classified gene: RNF135 as Red List (low evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.788 | RNF135 | Louise Daugherty Gene: rnf135 has been classified as Red List (Low Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.620 | RNF135 | Konstantinos Varvagiannis reviewed gene: RNF135: Rating: RED; Mode of pathogenicity: None; Publications: 30665703, 17632510, 26368817; Phenotypes: ; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.588 | RNF13 |
Konstantinos Varvagiannis gene: RNF13 was added gene: RNF13 was added to Intellectual disability. Sources: Literature Mode of inheritance for gene: RNF13 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Phenotypes for gene: RNF13 were set to Congenital microcephaly; Feeding difficulties; Failure to thrive; Abnormal muscle tone; Global developmental delay; Intellectual disability; Seizures; Cortical visual impairment; Sensorineural hearing impairment Penetrance for gene: RNF13 were set to unknown Mode of pathogenicity for gene: RNF13 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: RNF13 was set to GREEN Added comment: Edvardson et al. (doi.org/10.1016/j.ajhg.2018.11.018) report on 3 unrelated individuals with heterozygous de novo missense RNF13 variants. Features included (rather borderline) congenital microcephaly, feeding difficulties, tone abnormalities, DD/ID (3/3), seizures (3/3), hearing loss and cortical visual impairment. One individual harbored the p.Leu311Ser variant while 2 others the p.Leu312Pro. RNF13 encodes a protein known to interact and activate IRE1a, an endoplasmatic reticulum (ER) stress sensor. The 2 variants are predicted in silico not to affect the tertiary structure of the protein. Further to this, RNF13 is tolerant to LoF variants (pLI of 0 in ExAC). Therefore a gain-of-function mechanism was hypothesized for the 2 missense variants and demonstrated for the Leu311Ser: - Protein levels were similar to controls upon Western blotting in patient fibroblasts. - Enhanced IRE1a activation was demonstrated in patient cells when compared to controls, confirming gain-of-function. - Increased activation (/ER stress), in turn, resulted in abnormally increased apoptosis similarly to what is observed in other neurological disorders. Fibroblast/lymphoblast cells were not available from individuals with the Leu312Pro variant although a similar mechanism is presumed. Although neurodegeneration is suggested by the above pathophysiologic mechanism, this is manifested by failure to achieve milestones (rather than eg. regression after a normal period of postnatal development / loss of milestones). --------- RNF13 is not associated with any phenotype in OMIM, nor in G2P. This gene is not commonly included in gene panels for ID offered by diagnostic laboratories. --------- As a result, RNF13 can be considered for inclusion in this panel possibly as green (or amber). Sources: Literature |
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| Intellectual disability - microarray and sequencing v2.468 | RNF135 | Louise Daugherty Source Victorian Clinical Genetics Services was added to RNF135. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.468 | RNF125 | Louise Daugherty Source Victorian Clinical Genetics Services was added to RNF125. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.468 | NF1 | Louise Daugherty Source Victorian Clinical Genetics Services was added to NF1. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.443 | ISCA-37431-Loss |
Louise Daugherty Region: ISCA-37431-Loss was added Region: ISCA-37431-Loss was added to Intellectual disability. Sources: ClinGen,Expert Review Green Mode of inheritance for Region: ISCA-37431-Loss was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Phenotypes for Region: ISCA-37431-Loss were set to dysmorphic features, cardiac anomalies and mental retardation; 613675; variable facial dysmorphism, cafe-au-lait spots, neurofibromas and Lisch nodules in the iris, mental retardation, developmental delay, an excessive number of early-onset neurofibromas and an increased risk for malignant peripheral nerve sheath tumors; NEUROFIBROMATOSIS 1 MICRODELETION SYNDROME; NF1 MICRODELETION SYNDROME; Chromosome 17q11.2 deletion syndrome, 1.4Mb |
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| Intellectual disability - microarray and sequencing | RNF125 | Louise Daugherty classified RNF125 as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | RNF125 | Louise Daugherty commented on gene: RNF125 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | ZNF148 | BRIDGE consortium edited their review of ZNF148 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | RNF135 | BRIDGE consortium edited their review of RNF135 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | NF1 | BRIDGE consortium edited their review of NF1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | HNF1B | BRIDGE consortium edited their review of HNF1B | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | ZNF148 | Louise Daugherty classified ZNF148 as amber | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | ZNF148 | Louise Daugherty commented on ZNF148 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | RNF135 | Louise Daugherty classified RNF135 as amber | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | RNF135 | Louise Daugherty commented on RNF135 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | ZNF148 | BRIDGE consortium reviewed ZNF148 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | RNF135 | BRIDGE consortium reviewed RNF135 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | NF1 | BRIDGE consortium edited their review of NF1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | HNF1B | BRIDGE consortium edited their review of HNF1B | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | HNF1B | Louise Daugherty classified HNF1B as amber | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | HNF1B | Louise Daugherty commented on HNF1B | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | NF1 | BRIDGE consortium reviewed NF1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing | HNF1B | BRIDGE consortium reviewed HNF1B | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||